1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940b141ae1312023ea54b10dcfe12ce3bf256f559dd2a889c09a2f00ba929377. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b5b5767-92d7-44d4-bdd5-0a66d2b30333.json and https://artists.proofprofile.net/proofs/artist/3b5b5767-92d7-44d4-bdd5-0a66d2b30333.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8a355112ae4108183769b44a5d12e384dc3386d546a2dc3f44644c15670304. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q1938338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93428a5ea7c56c01dd17466b2f1741d6861ff752e0c2bc8e060f3bc1a655c5df. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:34:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q1938339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a561a918d5f82bb76cc8ca280973e9d86942161bc6df856c4e58d85e4a4d502. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q1938341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47635b9615933a51abf0853d93bf2fbc1d8c66cf1caab04c957df89153da83c2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q1938342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3c3592638e6e2e128d2bfa84c4243e81f04a63b9a191f5625b87dfdf6c2e06. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q1938343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f0c0a8944ac0c6f2ab3271e08e4f0c6b97227839012945e4b909935481acbb. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q1938344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025e612ec3b3b4b5d1822745bc578008c84fe6ceeaf12e58df7ded00912ee8b5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q1938345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3e0308da4598c30da92189f14aa7c2bd9c9bf005f76eaa57304f3f4dcc8164. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q1938346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d788b0402fb6544d35e1cfdedd21fad1aef4489c4d21e6109eff9cafe24b12. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:12:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q1938347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ce5bca1d1e2783d76aa3aa5ece3f6abbcbafcbf2a9bf225138829aa0661356. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q1938348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0b911f87f8c98373d394e17b868c9119d2615d81d3eee41ea055a073bdd85d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:10:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72045291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926794c55e4b16a258b5c4770c087c8a97bf552c996bfc7258282c2d12ebbe25. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA62093063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f7ab85525c5bf757e2405896e5afdd782b7d44db3fda72383d4607fc84ed7b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82145989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f11e6a08fe9e149da6d65bfeb5d78a4a8910a9a9b41b6ac17a29eed707e5563. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32250232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee1928320d1561d8615297a43327dab50e3e51997b36726e614e88c94611728. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAW2405633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510017f98af4045f984c90701315982040e34444e224c6edf275576065862e34. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAW2405636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e2f7c6203ca742e74c1ac303d9cd54d73f2418f073079fabdd1b15428dd4a1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFS2516153.